Wax-pot for sewing-machines.



w. R. BLAlR. WAX POT FOR SEWING MACHINES. APPLICATION FILED I'AN. 26| |916.

1,275,372. Patented Aug. 13, 1918.l

1mm. wAsnmamN. n c.

I UNITED sTATEs PATENT oEEIoE.

WILLIAM R. BLAIR, or ST. LOUIS, MISSOURI, ASsIGNoR To LAIvnIs MACHINE COMPANY,

or ST. LOUIS, MISSOURI, A coRroRATIoN orj-MIsSoURI.

WAX-rom FOR SEWING-MACHINES;

specincation of Letters Patent. V,Patented Aug. v13, 1918.

Application led January 26, 1916.V Serial No. 74,383.

To all 'whom t may concern:

' Be it known that I, WILLIAM RUBLAIR, a citizen of the United States, residing at the city of St. Louis,.State of Missouri, have invented a certain new and useful Improvement in Wax-P0ts for. Sewing-Machines, of'

which the following is a full, clear, and exact description, lsuch as will enableothers skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this' specification.

This invention relates to certain improve-Y strength, preventing its Vfraying, and decreasing .the friction of its passage through the material. thread is fed to the sewing mechanism, the wax being first softened by heat soV as to render it fluid. Y Y

The principal obj ect of my invention is to provide a wax pot so constructed as to secure a lrapid and thorough heating .of the wax by the use of a minimum amount of heating fluid.

Another purpose of the invention Is to provide a wax pot having the parts so arranged as to insure a thorough impregna tion of the thread by the Wax. v

Another Object is to provide a wax pot having highly efficient heating performance and in which the wax is at all times protected from contact with the heating fluid or condensation thereof. y

A still further object is the provisionof a wax pot in which all parts Vmay be thoroughly cleaned of old wax'.

A still further object is to provide a wax pot which may be operated eiiciently while employing only a small quantity of wax;

A further object is to provide a wax pot whereinrthe .stripping mechanism is so arranged and associated with the wax heating mechanism as to secure the heating of both to a uniform temperature. y l A further Object is to provide a wax pot which. will be eflicient in heating other portions of the thread-handling mechanism of the machine. j p

Y A further Object is to provide a wax pot This wax is applied as the,

in which all the parts are readily accessible v while the device is on the machine.

Other objects will be Vobvious or pointed out hereinafter. Y

` In the drawings:

. Figurer 1 represents a transverse leleva.- tionalsectional view of the wax pot AVFig. 2 representsoa longitudinal elevational section substantially on line 2 2 of Fig. 3; 7 i

Fig. 3 is an illustrative front elevation. The device in the embodiment shown comprises a pot member 1 which is designed'to be. suitably supported on thestandard or frame work of the machine, and which is closed at itsupper end by a cover member 2,

likewise supported on the machine frame and upon the potmember l. The pot ,member 1 is formed so that the cross-sectional area of its lowery portion is considerably less than that of its upperportion, the smaller portion comprising substantially the lower third of the height of the pot. The sides of the pot slope rather abruptly downward to the narrow lowerportion from Vthe broader upper Vportion and have smooth inner sur-A faces. The frontwallof the larger upper portion'is formed with an aperture across substantially its entire width, which aperture is closedby a door 4.. The bottom of thepot is formed with a tap opening which is closed by a tap screw 5. Y

The cover 2 is formed with a chambered housing 6 depending within the upper portion of the pot, and `in said .housing are seated strippers 3,. which operate in the usual fashion to strip superfluous wax off of the thread when it is drawnv through them. The housing 6 is provided with aconsiderable chamber VV6a having an inlet Opening through its upper wall and an outlet opening through its lower wall, said chamber being situated in proximity to the portions of the housing 6 in which the strippers are seated. A supply pipe 7 communi- Cates lwith chamber athrough the opening in its upper wall, said supply `pipe leading from any suitable source for supplying heating Huid. This Vsupply pipe is connected by a coupling 7 a with an inlet plug 'Zh which is seated in the upper wall of housing 6. A coil 8 is situated in the lower contracted portion of the pot, being spaced apart both from thesiole and bottom walls thereof, and being supportedyby its connection by means of a coupling 6a to an outlet plug 8b which is seated in the outlet opening in the lower wall of chamber 6a. The lower end of coil 8 passes out through a suitable aperture in the bottom of the pot, and has communication with a return or discharge pipe 10.

The width of coil 8 is sufficient to permit thread-guiding sheaves 11 being positioned within the coil. Said sheaves are rotatably mounted on a removable bracket 12,

which is removably affixed at its upper end to the front wall of the pot by means of a thumb screw 14 adapted to engage the exterior of said wall, and coperating clamping members 15, adapted to engage the interior side of said wall. -The upper end of said bracket passes out through the door aperture, the door itself being apertured at the bottom to accommodate the same. The lower portions of bracket 12 are curved inwardly and downwardly so as to position its lower end within coil 8. Bracket 12 may be detached, and it, together with its carried portions can then be removed from the pot by sufliciently loosening thumb screw 14 and withdrawing the parts through the door. The strippers 3 are easily accessible for removal and replacement through the door, and coil 8 may likewise be removed by loosening its coupling 8a and its attachment to -return pipe 10. A thread guide 1 6 is supported on the cover in proper position to guide thread to one of the sheaves 11.

In operation, steam, or other suitable heating fluid, is fed from pipe 7 intochamber 6a where some of its heat is imparted to the metal of the housing 6 in which strippers 7 are seated. This heats the strippers. Heating fluid from chamber 6n passes out through outlet plug 8b to coil 8. Wax in proper quantity is disposed in the pot, being inserted through the door, and being subjected to the heat from coil 8 is liquefied, and retained in the lower portion of the pot about the coil 8 and sheaves 11. The thread 17 is fed from a suitable source of supply through an aperture in one of the walls of .the wax pot to thread guide 16, whence it is guided down around one of the sheaves 11, and thence upwardly to one of the strippers 3, whence it goes to the sewing mechanism. As it passes down to, around, and up from sheave 11, the thread is transmitted through the liquefied wax, gathering wax upon it, the superfiuous modicum of which is removed by the stripper 3 and allowed to drop back into the lower portion of the pot.

In order to secure an adequate coating of the thread, it is necessary in this device to have only a small amount of wax, same being an amount sufficient to cover the sheaves. This is of great advantage from the standpoint of economy, as no appreciable amount of wax is ever left in the pot to become stale and perfolce to be thrown away, as the operator will be adding small quantities of wax from time to time, maintaining an adequate supply without causing a useless and wasteful superiiuity to be heated in the pot. This is also of importance from a technical point of view, as the wax, when frequently reheated or kept heated for a considerable time, as would be the case were a large mass of wax used, loses certain of its elements by volatilization, whereby its plasticity and life are decreased and the thread waxed therewith rendered less pliable.

The enlarged upper portion of the pot forms a considerable inclosed air space in which air, heated by radiation from housing 6 and the pipes and coil contained within the pot, is retained.' This operation keeps all portions within the pot and the pot itself, quite warm, and prevents rapid cooling of the wax if the supply of heating fluid is stopped for a time.y Heat transmitted to cover 2 from the pot and from housing 6, operates to keep machine parts above said cover warm, so as to insure proper handling of the thread. When it is desired to clean wax from the pot, it may be drawn off through the tap opening after removal of tap screw 5. f

It will be seen that in this device, the heating fluid is brought into intimate relationship with the wax to be melted, although it is kept absolutely separate therefrom so that neither the heating fluid itself nor any condensation of it, may come in contact with the wax. In the same way the thread is protected from any effect bythe heating fluid, although in its entire transmission to and from the wax, the thread is subjected to a high temperature which facilitates its impregnation by the wax. It will be seen that the device will be efficiently operated as it requires but a small amount of wax to insure thorough coating of the thread. All of the parts being easily accessible and readily removable, the device may be readily cleaned and repaired. It has been found that this device operates very efficiently with a steam pressure of four or five pounds, from which it is obvious that the device is absolutely safe.

I am aware that changes and modifications may be made in the device so that it will differ in some features from the embodiment herein shown. I am also aware that heating fluid other than steam may be employed. Such obvious changes and modifications, however, are all within the contemplation of my invention which I do notV regard as being limited to the specific form herein l illustrated and described.

` Vhat I claim is:

1. A wax pot Vfor thread-handling machines comprising v'a closed container having its lower portion of lesser area than its upper portion, a closed coil disposed in said lowerl portion, a stripper disposed in the upper portion of the container, means for supplying heating fluid to said coil, and a movable door portion whereby wax may be introduced into said container for deposit adjacent said coil.

2. In a thread handling machine, a wax pot, a heating coil disposed in said wax pot in the form of a vertical helix, and a revoluble member disposed in the space within said coil, which revoluble member serves as a bearing for the thread passing through the wax pot.

3. A wax pot for thread-handling machines comprising a container for the reception of wax, a conduit in the form of a helical coil arranged within the lower' portion of said container and having communication exteriorly of said container with means for supplying heating Huid thereto, and a thread-guiding device removably positioned within the helix of said coil.

l. A wax pot for thread-handlingv machines comprising a. container, a conduit for heating Huid disposed in the form of a coil within said container, said container being provided with a door disposed above said coil for permitting the introduction of wax thereinto, a bracket insertible into and withdrawable from said container through said door, and thread-guiding means carried by said bracket.

5. A wax pot for thread-handling machines comprising a closed container, a heating coil disposed in the lower portion of said container, a stripper bracket disposed in the upper portion of said container, means for conducting heating fluid into said stripper bracket and said heating coil and a revoluble member arranged in the space Within said coil, which revoluble member serves as the bearing for the thread passing from the stripper bracket through the wax pot.

6. A wax pot for thread-handling machines comprising a container adapted for the reception of wax, a heating coil disposed in the lower portion of said container, aV

revoluble member disposed in the space within said heating coil and adapted to serve as a bearing for the thread passing through the wax pot, a stripper bracket disposed within the upper portion of said container, means connecting said stripper therefor, a stripper bracket formed integral v with said cover and disposed within'the wax pot, said stripper bracket being formed with a chamber, a stripper supported by the stripper bracket adjacent said chamber within the pot, and means for conducting heating fluid into and out of said chamber.

9. In a thread-handling machine, the combination of a wax pot, a covertherefor, a stripper bracket supported on said cover within said Wax pot, said stripper bracket being shaped to forma chamber, a stripper mounted on the stripper Vbracket adjacent said chamber within the pot, and means for conducting heating fluid into the chamber and pot.

10. In a wax thread machine,`the combination with a wax pot having a lateral opening, of a bracket insertible into the wax pot through said opening, means for securing said bracket in operative position on the vin the form of a vertical helix, and means for guiding thread through a portion of said helix longitudinally thereof.

In testimony whereof I hereunto affix my signature in the presence of two witnesses, this 24th day of January, 1916.

WM. R. BLAIR.

Witnesses:

M. P. SMITH, C. S. BUTLER.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

